Signments



Patented May 17,1927.

ALOIS ZIN No Drawing.

KE AND ALBERT KLINGLER, 0F GBAZ, AUS TRIA, ASSIGNORS, BY MESNE AS- SIGNMENTS, TO FELICE IBENSA.

PROCESS FOR MANUFACTURING DIHYDBOXY PERYLENE.

June 14, 1922, of Series manufacturing for of 1915, a process dihydroxyperylene (O l-I 0 is described which consists in intimately thyls with such as chl mixing alkylated dioxybinaphring closing condensing agents oride of aluminium and heating the mixture to a temperature below the melting or softening temperature of the dlhydroxyperylene, whereupon the condensing agent together with its products of decomposition are removed by lixiviat-ion. Now

it has been ated dioxybinaphthyls themselves also as dinaphthols, timately mixed with agents and one quarter pera ture in lieu of the alkylthe dioxybinaphthyls which are known on the market may be used. When inring closing condensing heated for a period of time from of an hour to one hour to a temfound that below the melting temperature of the dinaphthols they directly give dihydroxyperylene,

the output being very satisfactory; Preferably some basic substances are added such as alkali or alkali earth metal hydro-xides or carbonates.

to the mixture before heating More particularly car- :bonates are advantageous inasmuch as the mass is loosened, and

the active surface is increased by the carbondioxide set free,

whereby the reaction is promoted and the agitation or stirring of the mass is rendered possible or facilitated. I

The following is an example of carrying into practice the present improved process.

Forty parts by naphtholare intimately mixed with 40 parts bylweight-bf anhydrous soda and 300 parts by weight of anhydrous aluminium chloride and the mixture is"heated,for a'period of "time not exceeding half an "hour to a temperature not The mass thus obtained is boiled with dilute-- hydrochloride 'acidand the residue resuitexceeding 17 0 ing afteri-wasl'ng consists mainly of dihydroxyperylene which may be scribed in t purified as de-' he said prior application, or may weight of commercial B dicentigrade.

AppH-eation'tled October 4, 1922. Serial No. 592,203

be directly utilized for manufacturing perthe method described in the prior ylene by Serial No. 568289 June 14:, 1922.

application The present improved process offers the advantage that by using the commercial dinaphthol instead of alkylated dioxybinaphthyls there is secured a material simplification of the process and at the same time "a large reduction of the costs of manufacture 2, A process for manufacturing dihy-.

droxyperylene consisting in intimately mixing dinaphthols and basic compounds ofthe alkali forming metals, heating the mixture for a period of time not exceeding one hour to. a temperature not exceeding the melting temperature of the dinaphthols and lixiviating the mass obtained whereby any undecomposed-aluminun chloride and such bas c compounds and products offdecomposition thereof are removed; v H

3. A process for manufacturing dihy- 'droxyperylene,[consisting in intimately mixing dinaphthols With aluminum chloride and carbonates of alkali ceeding the'melting temperature of the dinaphthols and lixivi-ating the mass obtained, whereby any undecomposed aluminum chloride and uch' arbonatesand products of decomposition thereof are removed. In testimony whereof we signed our names to this specification at Vienna,- day of September,-1922.

m. ALOIS ZINKE.

DR. ALBERT KLINGLER.

with aluminum chloride this seventhp forming metals, heating thennxture for a. period of time not exceeding one hourto a temperature not ex-' 

